Combination truck and wagon dump



T. E. BRI'ITON. COMBINATION TRUCK AND WAGON DUMP.

. APPLICATION FILED FEB. I7. I92I. 1,420,078' I T. E. BRITTON.

-COMBINATION TRUCK AND WAGON DUMP.

' AFPLlcATloN man F5847. mi.

Patented June 20, 1922.

2 SHEETS-SHEET 2.

Fa'g. A?.

Inf/@non MHLV' Attorney.

unirsi) stares PATENT FFC.

turrones enteren, or CEDAR semis, Iowa..

COMBINTIN TRUCK WAGON DUMP.

following is a specification.

My inventionrelates to improvements in combination truclr and wagondumps.E particularly to tiltable dumping' platforms for use in elevatorsor other places.

Une object of my improvements is 'to combine in lthe apparatus suitablemeclianism for tilting the wagon platform independent-ly, or fortilting` the wagon and trui'lr platforms together and simultane ously,and including a, self-locking device appropriate to hold theplatforms inany position within their scope of tihzing1 move ments.

Another object of my improvements is to adapt the mechanism. toautomatically' limit and stop the tilting movement of the platformsadjustably.

Another object of my improvements to provide means for manuallyinitiatingI and controlling the movements of said mechanism, and forreversingthe mecha nism in the returning` of the platforms to theiroriginal position. Y

Another object of my improvements is to permit of separating drivenportions of said mechanism from power-actuated drivingv portionsthereof'j and the changing of position of the former to allow them to bemanually actuated when necessary.

These objects have heen accompl ished by the means and mechanism whichis hereinafter described and claimed, and which is illustrated intheaccompanying drawings, in which F 1 is a vertical longitudinal sectionthrough the combination truclr arid Wagon dumping, platforms, showing`in side elevation the inerlianisnifor controlling` and tilting theplatforms7 the full lines showing the platforms and the mechanism atrest before tilting" of the platforms downwardly, and the dotted linesshowing tilted position of the connected platforms with Changedpositions of'parts of .the mechanism, including the changed position ofthe worm-shaft when used for manually operating'the tilting-means- Fig.2 is an under plan view the parts and mechanisms shown in said Fig. 1,the

Specification of Letters Patent. Pirtgjtgd Jluiigig, 192,2.

Application. 'mail' February 17', 1921.

saisi no. Maele.

prime motor and electric connections thereto beinggY omitted.

Like numerals of reference denote corresponding parts in said figures.

The numeral 1 denotes a fixed elevated platform over a basement or otherspace, and an elongated opening' 17 is provided in said platform boundedon its longitudinal sides by the framing beams 2. A pair of hinged doors9 and 10 arel positioned in one end 8 of the said opening over a placeof deposit below. A transverse shaft 3 crosses the opening 17 mediallyand has its eX- tremities mounted in bearing-openings in thev beams 2.

The numeral 4l denotes a wagon platform oeciipying the part of theopening` 17 neat to the doors 9 and 1l), and has longitudinal side beams5 mounted to rock up or down medially on said shaft 3, the platform being' of less width than said opening 17 to afford clearance spaces forthe longitudinal side beams 7 of a Vtruck platform (3.

The truck platform is composed of 'the forward platform portion Gforming a continuous extension forwardly of the platform et and filling`the forward portion of the opening' 17. This portion 6 has thelongitudinal side beamsV 7 which project rearwardly therefrom as far asthe rear end of the platform Ll within the clearance spaces between theplatform et and the fixed side beams 2. rfhe beams 7 are mediallypivotally mounted on said shaft 3.

In order to permit of releasably connecting' the two platforms togetherso that the wagon platform 4 may be tilted independently, or theconnected platforms fland (5 be tilted together sinuiltaneoiisly, l haveprovided a securing device, shown in Fig. 2, but which may be varied inits construction', arrangement. or position as desired. rThe device isshown as connecting the rear part of a platform 4f to the rear ends ofthe side beams 7 of the truck platform G.

This device comprises alined bolts 13. positioned across the under sideof the platform d to slide in and out of catches 11 on the under sidesof the beams 7 from the bearings 12 on the under sides of the beams 5.Toggle-members 111 are pivotally conneoted between the inner ends ofthebolts 13 and the medially located operating element 1 5 having` anupturned finger passing through a short longitudinal slot 16 in theplatform worm-wheel.

Cri

4. This element 15 may be shifted longitudinally to operate thetoggle-joint to conneet or disconnect the bolts 13 with or from thecatches 11 to lock or unlock the platform 4 relative to the platform 6.

At the ends of a forward cross beam of the platform 4 are bearings onwhich are pivoted suspended rack-bars 22. The transverse shaft 21 isrotatably mounted in bearings 20 on the frame beams 2 and carries a pairof like pinions 24 intermeshing with the racks 22,the racks being keptin engagement with said pinion by yokes 23, with included anti-frictionrollers 25 bearing on the racks. On one end of the shaft 21 is fixed awormwheel 26. The numeral 28 denotes a yoke whose ends are pivotallymounted to rock on the shaft 21 on opposite sides of said wormwheel, andsaid yoke carries an integral bearing-sleeve 29 within which isrotatably mounted a worm-shaft 30 provided with a terminal worm 27intermeshing with said On the other end of the shaft 30 is fixed abelt-wheel or pulley 24, to carry a belt 57 passed about adriving-pulley 56 on the rotatable shaft of a reversible electric motor55. The numeral 31 denotes a fixed hanger open-top bearing, andthenumeral 32 denotes a sleeve loosely mounted between fixed collars onsaid shaft 30 and positioned removably in the bearing 31. A terminallylooped arm 33 projects upwardly from said Sleeve 32. In the platform 1above the shaft 30 is an elongated opening 18 covered by a hingedclosure plate 19. When this closure plate is swung open, and the belt 57unshipped from the pulley 34, the latter and the shaftv V30 may be swungupwardly through the floor opening 18 tothe erected position kshown indotted lines in said Fig. l, and in that position, the tilting of theplatforms may be effected manually by means of a hand crank 61detachably coupled with the clutch-face 58 on the end of said shaft,when necessary, or at times when electric power is not available. Thelooped handle 33 is used to rock said shaft upwardly, and the worm 27shifts around the circumference of the worm wheel 26 to the extent ofthe proper arc ofmovement.

The numeral 41 denotes a slot out in the fixed platform. 1 mediallyalined with the opening 18. At the rear end of this slot is fixed aforked spring lclip 42. A The numeral 38 denotes a terminally looped armpassing downwardly through the slot 41 and pivoted a little above itslower end on a depending hanger 40. When rocked rearwardly in said slot,the arm 38 is received within and detachably clasped bythe forks 42.Said arm 38 forms one member of a bell-crank lever of which the othermember 37 carries a terminal brake-head 35 positioned to be rocked intoor out of frictional engagement with the rear part of the elongatedpulley 34 below.

The numeral 48 denotes a curved depending arm fixed on one of the sidebeams 5 of the wagon platform 4 and carries a spaced pair ofslide-bodies 43 and 50 adjust-ably secured thereon by means of setscrews. These slide-bodies carry respectively laterally directed rigidarms 44 and 49 having terminal wedges, shown at 43 and 50. Said wedgesare respectively positioned rearwardly and forwardly of the arm 38. Thelower end of the arm 38 is continued downwardly from its pivot to serveas the movable member 52 of a make-and-break device mounted on thehanger 40 which includes conductors 53 and 54 in circuit with thereversible motor 55, and this make-and-break device is also in circuitwith a source ofA electrical current 62 by way of the conductor 59 and areversing switch 60.

rThe platform 4 or the connected platforms 66 may be tilted downwardlyat the rear to permit of dumping the contents of either a wagon, or of alonger truck respectively, into the receiving opening 8 after the hingeddoors 9-10 have been swung open, and then the forward door 10, ifpropped in an inclined position, may serve as a chute.

Referring to said Fig. 1, in which the looped arm 38 is held releasablywithin the yieldable forked spring clip 42, it will be seen that themake-and-break arm 52 is in a position to close the circuit. To initiatetilting of the platform, the switch 60V is operated manually to closethe circuit through the source of electrical current 62 and tie electricmotor 55, starting the latter in the appropriate direction. The pulley34, shaft 30 and worm-gear are thus rotated,'the pinions 24 shifting theracks22 upwardly to tilt the platform about its shaft 3 vto lower itsrear end. arm 48 with the rear part of saidV platform, the wedge 43engages either the arm 38 or a lug 51 secured thereon, and in the con.-tinued descent pushes the arm. 38 forwardly' until it is released fromlthe spring clip 42. when the gravity of the brake-head 35 rocks thearms 38 and 37 ar further distance for wardly till the brake-headengages frictionally the pulley 34 at a time when the rearward movementof the lower member 52 has opened the electric circuit through the mostor. These two actions occur about simul taneously, so that the drivingaction of the motor ceases as the brake is applied to vcause instantystoppage of the tilting platform. The loop 45 on which the arm 44 andwedge 43 is mounted can be adjusted along the ar'- cuate arm 48 to varythe scope of downward movement of the platform.

To re-elevate the platform, the arm 38 is rocked rearwardly manually toenter the spring-clip 42, and the brake-head 35 is thus lifted, while atthe same timethe contact arm 52 is rocked forwardly to again close lnthe descent of the arcuateV the circuit. Operation of the 'switch-devicemay then be effected to reverse the motor 55 while starting it, and theplatform is then tilted upwardly at the rear of the above describedpower transmission mechanism. As the arm 48 moves iuuvardly, the lowerwedge 50' engagesthe lug 5l on said arm 38 at the upper limit of itsmovement to retain the arm 38 in secured position. This wedge does notprevent moving of the arm 38 past it when pushed forwardly manually.

Attention is directed to the worm-gearing in the power-transmissionmechanism, which is self-locking and holds the platform locked in anyposition in which it is stopped.

j Having described my invention, what I claim as new, and desire tosecure by Letters Patent, is:

l. A tiltable dumping platform, and means for tilting it comprising arack mounted thereon, a pinion meshing with said rack, and self-lockingmechanism including a worm and worm-wheel intermeshed therewith with theworm mounted to rock about the worm-wheel and operatively connected toand adapted to rotate said pinion.

2. A. tiltable dumping platform, and means for tilting it comprisinglike racks mounted on one end thfneof` a rotatable shaft, pinions fixedon :said shaft and intermeshed with said racks, a worm-wheel fixed onsaid shaft, a rotatable worm-shaft having a worm intermeshed with saidwormwheel, and mounted to swing therearound while keeping intermeshedtherewith, and means reversible for rotating` said wormshaft in eitherof opposite directions.

3. A tiltable dumping platform, and means for tilting it comprising likeracks pivotally suspended from one end thereof, a rotatable shaft,pinions fixed on said shaft and intermeshed with said racks, awormwheel. fixed on said shaft, a rotatable wormshaft having a wormintermeshed with said worm-wheel, a pulley fixed on said wormshaft,means for rotating said pulley, and a brake for occasional frictionalengagement with said pulley.

4L. A. tiltable dumping platform, and means for tilting it andcontrolling its movements comprising racks mounted on one end thereof,pinions intermeshed with said racks, and mechanism for simultaneouslyrotating said pinions including elements movable from one relativeposition to another to use either power or manual actuation.

5. A tiltable dumping platform, and means for tilting it and controllingits movements comprising mechanism operatively connected to one endthereof to tilt it down-n' wardly or upwardly, a motor adapted toactuate said mechanism, and disconnectible elements between the otherend of said platform, and said motor adapted to automaticallydiscontinue the driving action of the motor on said mechanism when theplatform has been tilted downwardly at its delivery end to apredetermined distance.

G. A tiltable dumping platform, and means for tilting it and controllingits movements comprising .mechanism adapted to tilt it up or down, andother means operatively associated with said mechanism for automaticallyand simultaneously both stopping the mechanism and l'frictionallybraking a rotatable element thereof in tilting the platform downwardlyand including elements for occasional manual actuation in starting saidmechanism in operation.

7. A tiltable dumping platform, and means for tilting it and controllingits movements, comprising racks mounted on one end thereof, a rota-tableshaft, pinions on said shaft intermeshed with said racks, a worm-wheelon said shaft, rotatable worin-shaft carrying a. worm intermeshed withsaid worm-wheel and mounted to be rocked about said worm-wheel, and apulley fixed on said worm-shaft for power connection, said worm-shafthaving a. terminal clutch-face for engagement with a detachableclutch-element for occasional manual actuation.

8. A tiltable dumping platform, and means for tilting it and controllingits movements, comprising mechanism connected to one end thereof adaptedto tilt it to and fro, and means, including selective groups ofelements, for both stopping and braking said mechanism in tiltingtheplatform in one direction automatically, and in varying the actions ofsaid mechanism in any adjustably regulated position of the platform.

9. A tiltable dumping platform, and means for tilting it and controllingits movements, comprising a reversible electric motor in circuit with asource of electric current including make-and-break devices, mechanismoperatively connected between said motor and one end of said platformoperable to tilt the platform to and fro, and other means connected tothe other end of said platform operatively associated with one of saidmake-and-break devices to automatically operate said device to open saidcircuit when the delivery-end of the platform has tilted to a dumpingposition.

l0. A tiltable dumping platform, and means for tilting it andcontrolling its movements, comprising an electric motor in circuit witha source of electric current including a. make-and-break device,mechanism op'- eratively connected between said motor and said platformoperable to tilt the platform to and fro, and including a friction-wheeland a brake-head movable into or out of frictional engagement therewith,and other means connected to said platform adapted to automaticallysimultaneously operate said brake-head to engage said friction-wheel,and to actuate said make-and-break device to open said electric circuitwhen the delivery-end of the platform has arrived at either' limit oftilting.

l1. Combined truck `and wagon dumping platforms, comprising a shaft onwhich both lelements of the platforms are medially pivoted, meansforrdisconnectibly connecting said elements together to be tiltedtogether simultaneously Orseparately, and mechanism operativelyconnected to one of said elements, including self-locking means, for

, tilting it to and fro.

1Q. Combined truck and wagon dumping platforms, comprising a shaft onwhich both elements of the platforms are medially pivoted, means fordisconnectibly connecting said elements together to be tilted togethersimultaneously or separately, mechanism operatively connected to one ofsaid elements, including movable Vself-locking means, for tilting it toand tro, and other means associated detachably with said mechanism tocontrol and limit its action selectively, either manually in operatingin either direction, or automatically by power drive in both operatingitV and limiting its scope of movements.

13. In combination, a tiltable body, meehanism for tilting it to and froincluding a rotatable element, a brake-head mounted on a pivoted arm,said arm adapted to swing to and iii-o past its dead center torictionally engage or be disengaged from said rotatable element, an armfixed on said tiltable body, and a lug mounted adjustably upon said ixedarm adapted to releasably engage said pivoted arm to push it over itsdead center to swing into frictional engagement with said rotatableclement when said tiltable body is tilted downwardly.

14:. In combination, a tiltable body, electrically-operated mechanismfor tilting it to and fro including` a rotatable element, a brakeheadmounted on a pivoted arm, said arm adapted to swing to and frov past itsdead center to frictionally engage or be disengaged from said rotatableelement, an arm fixed onsaid tiltable body, a lug mounted adjustablyupon said iixedarm adapted to releasably engage said pivoted arm to pushit over its dead center to swing` into trictional engagement with maidrotatable element when said tiltable body` is tilted downwardly, andmeans ilior interrupting the action of said electrically operatedmechanism adapteifl to be actuated by said pivoted arm when it is swungin one direction by said lug on said lixed arm.

Signedl at lVaterloo, Iowa, this lftth day ot Feb., 1921. Y

Tuoi/ias Barmen.

